SA656SW
Installation of modified Continental O-470-13 engine, McCauley 2A36C18 propeller, exhaust system mod, battery relocation, and Woodward 210 series propeller governor. STC SA504SW, SA568SW, and SE699SW are required with this mod. Held by Stephen Noyes, which holds 9 approved modifications in all. Last revised September 12, 2007. System: propeller.
What it applies to
- Kind of product
- Aircraft
- Design holder
- The Cessna Aircraft Company
- Models
- 305A (USAF 0-1A)
- Type certificate
- 5A5
- On this site
- Cessna Ector 305 20 registered
- The FAA's record
- On the FAA's site
What an approved modification is
A supplemental type certificate is the FAA's approval of a change to a certified design: a new engine or propeller, avionics, an autopilot, floats, a parachute, a larger fuel tank, an ice-protection kit. The company holding it may sell the kit and the paperwork to owners of the listed models; the modification then becomes part of that aircraft's record. The FAA's list says what was approved and for which models, not how many aircraft carry it.
Source: FAA supplemental type certificates (Dynamic Regulatory System). Register counts from the FAA register of October 5, 2026.